Grease cup



Y preferably tubular and is provided VWith reduced portions adapted topa-ss through'suittremities of the reduced portions areupset as at 23 for securing these parts together.

The cap extends for any desired 'distance above the bottom of the c up 10 and .has

4provided therein a recess 24,into which thel enlargedv portion of the plunger is adapted to enter so that the tlireads-onlthe portion 20 lmay be entirely disengaged from the threads 13 inL the Y cup to permit the capV 15 and plunger 19 tobeV removed as a unit fronrthe cupV when desired.` The height of therecess 24 is only slightly greater than the height of 'the portion 20ct the lplungercontaining the screw threads 2l, so 'that when the. screw 4threads-21 `have' been v entirely disengaged `from thethreads 13 4oft 'the cup 10, v`the enlarged portion 2O of theplunger Will'ill'- the 'space24-' The cap15 may be'ldetachably,securedto' vthe cup' 10 iny any desired 1 or suitable kmanener, but preferablyb'y means of a bayonet slotvv connection embodying one or 'more bay-v onet slots 25, andy one or 1 more pins 26,*pro'C vjecting beyond the outer'yvall-of the cup 1Q,

so that,when"the cap-ljis'plaeed in position 'the pins y26 will enterthe bayonet slots '25 and after the capV is rotated with respect-toV the cup, 'the parts will be locked together.

The body of the cap or skirt! 15 is split as vat 27, Within 'the confines of theedges of the cap,and the split portionn 27 communicates with the. bayonet slot t OneV of these split portions or slots may beY provided ad-V jacent each of the bayonet slots 2,5 and are 'provided for the purpose of causing a portion of -the cap or skirt 15 to be re'silient'so that When the plunger 19 assumes the position shown in Figure 2, with the threads 21 on the portion 20 of the plunger entirely disengaged from the threads'l of the/cup 10 and'with the plunger. disposed entirely Withing the recess or space 2,4, the resilient-portion 28- of the cap will be placed-under tensionand'this tension will Vtend to hold the lower edge of the enlarged portion 20 of the plunger 19 againvstrthe edge ofthe cup 10 and in such a position that when the plunger19'is rotated by the handle 22 the threads 21 will be properly positioned to engage the threads 13 of the cup 10.1This Will obviat-e ra mutilation, cutting or stripping oi the threads. Furthermorewhen the cup is full v of` grease andtheparts are in the position 'uponthe 'endfof vthe plunger 19 to cause the co-operating threads toy start" to engagea? In "other-Words, the resilient portions 28 "ofthe cap ,15. serve as i ai means for automatically causing the threads 21 on the plunger' 19 to' engage the threads 13 ,in thecup 10 when 'l the plunger is rotated. Y able openings in the handle 22 andthe ex- Obviouslyany 'number of these Abayonet slots 25, slots 27VV and resilient portions '28 f -29 =otla diameter to snugly,Y litv Within the plunger. A WasherBO preferably-of leather Y or? any other suitable material,vis=secured to" the y bottom otfthe element 29,preferably bymeans of a fastening device 3 1 suchl as a rivet or the likewhichrpass'es through a disc'. Y

32, the Washer 30 "andi-the element 29, and between Which-disc 32'alnd.l element 29 Athe Washer 30 isv located. Y Y

VThe Washer 30 Vis of a diameter somewhat la'rgerithan the'internaldiameter of the `plunger 19 sothativvhen thewasher is placed `Within plunger, the periphery 33 of `the Washer willl be deflectedas shown to cause the Washer 304'to assumeV aV cup yshape formation.V

ment 29. Thiss'pring 34 tends normally to move "the supplemental plunger toward the openend 'of the plunger '19 and-.thereby iclo's'e the opening 'in the-plunger. y lmeans `tor 'preventing displacement of the Asa supplemental plunger there ymayA be pro-v vided a resilient split ring 35, which vlatter is adapted to be seated withinla recessv 36 within thel plunger 19,` The' element 35 also j Interposed between the handle 22-0frthe plunger '19 and the element 29 is an elastic vmember "3271, preferably yin thefformofa coil vs'pringgone end' of which engages the'handle landvtherother end is4 seated AWithin theV eleliquidtight jointl and thereby prevent the grease or; liquid from passingintothe. plunger 19 above thesupplemental piston; Y When the plunger 19 is rotated the supi plementalplungervwill also be rotated. Y

lVith this improvedconstruc'tion',it Will 'be manifest that lwhen the parts are in the position; shown'jin: Figure 2,1'and assuming that the cup `10is filled with grease, when the plunger 19 is rotated the screw threads 21' engaging thethreads lxwill causesthe 'i plunger 19 to be advanced Within: the cup.

As the plunger 19 ladvances the advancing 'movement of the supplemental plunger will bejretarded Vby'fthe rgrease within the cup. as

shown'more'cleajrly inFigure 3. The `advancement of the plunger 19 and the retard- 4ing of the advancing movement ofthe supplemental plungerjwill result. 'in the spring 34 being'compressedlso as to'store ener therein, with the resultithat the greasewwit in the rcupis placed-'under pressure'..hy'rea-k son ofthe supplemental plunger after the plunger 19 has been advanced to the desired distance. As the grease is utilized, it will be automatically fedthrough the opening 14 by meansof the supplemental plunger influenced by the energy stored in the spring l 34, with the result that there will be an automatic feeding of the lubricant to the partto be lubricatedrwhile the latter is in operation or in motion. This will insure a proper lubrication of the parts. The plunger 19 may be adjusted to any desired ,extent to cause the spring 34 to be compressed to the desired amount and any suitable means may be provided for limiting the extent of movement of the supplemental plunger with respect to the plunger 19, when the latter is being adjusted into the cup. A suitable and efficient means for accomplishing this result consists of a collar 37, which may be placed within the plunger 19. This collar may be of any desired lheight and is adapted to be engaged by the element 19V when the parts assume the position as shown in Figure 3..

The pins 26 may be formed in any suitable manner, but preferably by means of a bar or rod driven through the wall of the cup with the ends of the bar projecting beyond the outer wall of the cup, as shown more clearly in Figure 5.V Y

lith this improved construction it will be manifest that the plunger 19 may be manually adjusted to acquire the desired tension upon the spring controlling the supplemental plunger and after the plunger 19 has been adjusted or set the lubricant will be automatically fed from the grease cup as it is consumed. Furthermore, the parts are so constructed that they may be all formed from stampings or castings, thereby reducing lto av minimum the machine work necessary on devicesof this character.

lVhile the preferred form of the invention has been herein shown and described, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims,

Without departing from the spirit of this invention. Y

What is claimed as new is 1. A grease cup embodying a` cup proper having internal screw threadsa cap for the cup. means detachably securing the cap in position. a plunger operable in the cup and having threads adapted to engage the lthreads in the cup, there being an opening in the cap through which the plunger freely slides. and interengaging means on the cap and cup for detachably securing the parts together` the threaded portion of the plunger adapted to disengage from the threads in the cup and assume a position within the cap beyond the end of the cup. said interengaging means exerting a tension upon the plunger when the Asai-d threaded parts ,are disengaged yto insure a properinitial positioning ofthe threads with respect to each other. v l

E2; A grease cup embodying a cup proper,

a eaptherefor and into which cap theV cup between the cap and cup, a portion of the' body of the cap being resilient and operating through said interengaging means to' hold the threaded portion of the plunger against the end of the cup.

3. A grease cup-embodying a cup proper, a cap therefor and into which cap the cup telescopes, interengaging means on the cap and cup for detachably securing the parts together, a plunger operable in the cup, said plunger extending thro-ugh the cup, means for operating the plunger from the outside of the cap, and threads on the plunger and in the cup adapted to interengage, the threaded portion of the plunger adapted to entirely disengage the threads in the cup and assumel a position Within the cap and beyond the endof the cup, the first recited means embodying a bayonet joint connection between the cap and cup, a portion of the. cap adjacent the said bayonet joint `being split to form a resilient portion for exerting a stress through said interengaging means upon the plunger.

a cap therefor and into which the cup telescopes, an open ended hollow plunger movable in the cup and extending through the cap, means whereby the rotation of the plunger will cause the same to advance within the cup, a follower movablejwithin theplunger and forming a closure for the open end of the latter, a spring disposed within the plunger and operating upon vthe follower, the said spring being placed under tension by the material in the cup when the plunger is advanced in the cup, said follower embodying ai cup shaped flexible wash er, and a removable annular element adjacent the end of the plunger to be engaged by the periphery of the said washer, said element arresting the movement of the follower*I under the stress of the vsaid spring and also operating to hold the peripherv of the washer againstV the wall of the plunger.

A grease cup embodying a cup proper, a cap therefor and into which the cup tele- 4t. A grease cup embodying a cup proper,

scopes, un open ended hollowpluuger inov-` able inv @he Cup und extendingtliough the cap, 'means whereby vthe rotation of the plunger will cause theV same to' advance Within the o up, 2L follower movable Within the plunger and forming a closure for the open end of the latter, zr Vspring.disposedf Withintlie plunger und operatingV upon` the follower, the Said spring being'placed under l tension by the material in the @up when the `ofthe plunger for limitingr Vthe'movement of plunger lis advancedin the cup, and an ann ulurv element` disposed v'v'vithin the plunger between the said follower andthe open end RICHARD l L. BARRETT.Y 

